video_parser.c 11.8 KB
Newer Older
1
/*******************************************************************************
Stéphane Borel's avatar
Stéphane Borel committed
2
 * video_parser.c : video parser thread
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
 * (c)1999 VideoLAN
 *******************************************************************************/

/* ?? passer en terminate/destroy avec les signaux supplmentaires */

/*******************************************************************************
 * Preamble
 *******************************************************************************/
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/uio.h>
#include <X11/Xlib.h>
#include <X11/extensions/XShm.h>

#include "config.h"
#include "common.h"
#include "mtime.h"
#include "vlc_thread.h"

#include "intf_msg.h"
Stéphane Borel's avatar
Stéphane Borel committed
26
#include "debug.h"                     /* ?? temporaire, requis par netlist.h */
27 28 29 30 31 32

#include "input.h"
#include "input_netlist.h"
#include "decoder_fifo.h"
#include "video.h"
#include "video_output.h"
33 34

#include "vdec_idct.h"
35
#include "video_decoder.h"
36 37 38 39 40
#include "vdec_motion.h"

#include "vpar_blocks.h"
#include "vpar_headers.h"
#include "video_fifo.h"
41
#include "vpar_synchro.h"
Stéphane Borel's avatar
Stéphane Borel committed
42
#include "video_parser.h"
43 44 45 46 47

/*
 * Local prototypes
 */
//static int      CheckConfiguration  ( video_cfg_t *p_cfg );
Stéphane Borel's avatar
Stéphane Borel committed
48 49 50 51
static int      InitThread          ( vpar_thread_t *p_vpar );
static void     RunThread           ( vpar_thread_t *p_vpar );
static void     ErrorThread         ( vpar_thread_t *p_vpar );
static void     EndThread           ( vpar_thread_t *p_vpar );
52 53

/*******************************************************************************
Stéphane Borel's avatar
Stéphane Borel committed
54
 * vpar_CreateThread: create a generic parser thread
55
 *******************************************************************************
Stéphane Borel's avatar
Stéphane Borel committed
56
 * This function creates a new video parser thread, and returns a pointer
57 58 59 60
 * to its description. On error, it returns NULL.
 * Following configuration properties are used:
 * ??
 *******************************************************************************/
Jean-Marc Dressler's avatar
 
Jean-Marc Dressler committed
61 62 63
#include "main.h"
#include "interface.h"
extern main_t* p_main;
Stéphane Borel's avatar
Stéphane Borel committed
64
vpar_thread_t * vpar_CreateThread( /* video_cfg_t *p_cfg, */ input_thread_t *p_input /*,
65 66
                                   vout_thread_t *p_vout, int *pi_status */ )
{
Stéphane Borel's avatar
Stéphane Borel committed
67
    vpar_thread_t *     p_vpar;
68

Stéphane Borel's avatar
Stéphane Borel committed
69
    intf_DbgMsg("vpar debug: creating video parser thread\n");
70 71

    /* Allocate the memory needed to store the thread's structure */
Stéphane Borel's avatar
Stéphane Borel committed
72
    if ( (p_vpar = (vpar_thread_t *)malloc( sizeof(vpar_thread_t) )) == NULL )
73
    {
Stéphane Borel's avatar
Stéphane Borel committed
74
        intf_ErrMsg("vpar error: not enough memory for vpar_CreateThread() to create the new thread\n");
75 76 77 78 79 80
        return( NULL );
    }

    /*
     * Initialize the thread properties
     */
Stéphane Borel's avatar
Stéphane Borel committed
81 82
    p_vpar->b_die = 0;
    p_vpar->b_error = 0;
83 84 85 86

    /*
     * Initialize the input properties
     */
87 88
    /* Initialize the decoder fifo's data lock and conditional variable and set
     * its buffer as empty */
Stéphane Borel's avatar
Stéphane Borel committed
89 90 91 92
    vlc_mutex_init( &p_vpar->fifo.data_lock );
    vlc_cond_init( &p_vpar->fifo.data_wait );
    p_vpar->fifo.i_start = 0;
    p_vpar->fifo.i_end = 0;
93
    /* Initialize the bit stream structure */
Stéphane Borel's avatar
Stéphane Borel committed
94
    p_vpar->bit_stream.p_input = p_input;
95
    p_vpar->bit_stream.p_decoder_fifo = &p_vpar->fifo;
Stéphane Borel's avatar
Stéphane Borel committed
96 97
    p_vpar->bit_stream.fifo.buffer = 0;
    p_vpar->bit_stream.fifo.i_available = 0;
98

Jean-Marc Dressler's avatar
 
Jean-Marc Dressler committed
99 100 101
/* FIXME !!!! */
p_vpar->p_vout = p_main->p_intf->p_vout;

Stéphane Borel's avatar
Stéphane Borel committed
102
    /* Spawn the video parser thread */
Jean-Marc Dressler's avatar
 
Jean-Marc Dressler committed
103
    if ( vlc_thread_create(&p_vpar->thread_id, "video parser", (vlc_thread_func_t)RunThread, (void *)p_vpar) )
104
    {
Stéphane Borel's avatar
Stéphane Borel committed
105 106
        intf_ErrMsg("vpar error: can't spawn video parser thread\n");
        free( p_vpar );
107 108 109
        return( NULL );
    }

Stéphane Borel's avatar
Stéphane Borel committed
110 111
    intf_DbgMsg("vpar debug: video parser thread (%p) created\n", p_vpar);
    return( p_vpar );
112 113 114
}

/*******************************************************************************
Stéphane Borel's avatar
Stéphane Borel committed
115
 * vpar_DestroyThread: destroy a generic parser thread
116 117 118 119 120
 *******************************************************************************
 * Destroy a terminated thread. This function will return 0 if the thread could
 * be destroyed, and non 0 else. The last case probably means that the thread
 * was still active, and another try may succeed.
 *******************************************************************************/
121
void vpar_DestroyThread( vpar_thread_t *p_vpar /*, int *pi_status */ )
122
{
Stéphane Borel's avatar
Stéphane Borel committed
123
    intf_DbgMsg("vpar debug: requesting termination of video parser thread %p\n", p_vpar);
124 125

    /* Ask thread to kill itself */
Stéphane Borel's avatar
Stéphane Borel committed
126 127 128 129 130
    p_vpar->b_die = 1;
    /* Make sure the parser thread leaves the GetByte() function */
    vlc_mutex_lock( &(p_vpar->fifo.data_lock) );
    vlc_cond_signal( &(p_vpar->fifo.data_wait) );
    vlc_mutex_unlock( &(p_vpar->fifo.data_lock) );
131

Stéphane Borel's avatar
Stéphane Borel committed
132
    /* Waiting for the parser thread to exit */
133
    /* Remove this as soon as the "status" flag is implemented */
Stéphane Borel's avatar
Stéphane Borel committed
134
    vlc_thread_join( p_vpar->thread_id );
135 136 137 138 139
}

/* following functions are local */

/*******************************************************************************
Stéphane Borel's avatar
Stéphane Borel committed
140
 * CheckConfiguration: check vpar_CreateThread() configuration
141 142 143 144 145 146 147 148 149 150 151 152 153 154
 *******************************************************************************
 * Set default parameters where required. In DEBUG mode, check if configuration
 * is valid.
 *******************************************************************************/
#if 0
static int CheckConfiguration( video_cfg_t *p_cfg )
{
    /* ?? */

    return( 0 );
}
#endif

/*******************************************************************************
Stéphane Borel's avatar
Stéphane Borel committed
155
 * InitThread: initialize vpar output thread
156 157 158 159 160
 *******************************************************************************
 * This function is called from RunThread and performs the second step of the
 * initialization. It returns 0 on success. Note that the thread's flag are not
 * modified inside this function.
 *******************************************************************************/
Stéphane Borel's avatar
Stéphane Borel committed
161
static int InitThread( vpar_thread_t *p_vpar )
162
{
163
    int     i_dummy;
164

Stéphane Borel's avatar
Stéphane Borel committed
165
    intf_DbgMsg("vpar debug: initializing video parser thread %p\n", p_vpar);
166 167 168

    /* Our first job is to initialize the bit stream structure with the
     * beginning of the input stream */
Stéphane Borel's avatar
Stéphane Borel committed
169
    vlc_mutex_lock( &p_vpar->fifo.data_lock );
170
    while ( DECODER_FIFO_ISEMPTY(p_vpar->fifo) )
171
    {
Stéphane Borel's avatar
Stéphane Borel committed
172
        vlc_cond_wait( &p_vpar->fifo.data_wait, &p_vpar->fifo.data_lock );
173
    }
174
    p_vpar->bit_stream.p_ts = DECODER_FIFO_START( p_vpar->fifo )->p_first_ts;
Stéphane Borel's avatar
Stéphane Borel committed
175 176
    p_vpar->bit_stream.i_byte = p_vpar->bit_stream.p_ts->i_payload_start;
    vlc_mutex_unlock( &p_vpar->fifo.data_lock );
177 178 179 180

#if 0
    /* ?? */
    /* Create video stream */
Stéphane Borel's avatar
Stéphane Borel committed
181 182
    p_vpar->i_stream =  vout_CreateStream( p_vpar->p_vout );
    if( p_vpar->i_stream < 0 )                                        /* error */
183
    {
184
        return( 1 );
185 186 187
    }
#endif

188
    /* Initialize parsing data */
189 190 191 192 193 194
    p_vpar->sequence.p_forward = NULL;
    p_vpar->sequence.p_backward = NULL;
    p_vpar->sequence.intra_quant.b_allocated = 0;
    p_vpar->sequence.nonintra_quant.b_allocated = 0;
    p_vpar->sequence.chroma_intra_quant.b_allocated = 0;
    p_vpar->sequence.chroma_nonintra_quant.b_allocated = 0;
Stéphane Borel's avatar
 
Stéphane Borel committed
195 196 197 198 199
    /* Initialize copyright information */
    p_vpar->sequence.b_copyright_flag = 0;
    p_vpar->sequence.b_original = 0;
    p_vpar->sequence.i_copyright_id = 0;
    p_vpar->sequence.i_copyright_nb = 0;
200

201 202
    /* Initialize other properties */
#ifdef STATS
Stéphane Borel's avatar
Stéphane Borel committed
203 204 205 206 207 208 209 210 211 212
    p_vpar->c_loops = 0;    
    p_vpar->c_idle_loops = 0;
    p_vpar->c_pictures = 0;
    p_vpar->c_i_pictures = 0;
    p_vpar->c_p_pictures = 0;
    p_vpar->c_b_pictures = 0;
    p_vpar->c_decoded_pictures = 0;
    p_vpar->c_decoded_i_pictures = 0;
    p_vpar->c_decoded_p_pictures = 0;
    p_vpar->c_decoded_b_pictures = 0;
213 214
#endif

215 216 217
    /* Initialize video FIFO */
    vpar_InitFIFO( p_vpar );
    
218
    bzero( p_vpar->p_vdec, NB_VDEC*sizeof(vdec_thread_t *) );
219
    
220 221 222
    /* Spawn video_decoder threads */
    /* ??? modify the number of vdecs at runtime ? */
    for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
223
    {
224 225 226 227
        if( (p_vpar->p_vdec[i_dummy] = vdec_CreateThread( p_vpar )) == NULL )
        {
            return( 1 );
        }
228 229
    }

Stéphane Borel's avatar
 
Stéphane Borel committed
230
    /* Initialize lookup tables */
231
#if defined(MPEG2_COMPLIANT) && !defined(VDEC_DFT)
232 233
    vpar_InitCrop( p_vpar );
#endif
Stéphane Borel's avatar
 
Stéphane Borel committed
234
    InitMbAddrInc( p_vpar );
235 236 237 238
    InitDCTTables( p_vpar );
    InitPMBType( p_vpar );
    InitBMBType( p_vpar );
    InitCodedPattern( p_vpar );
Stéphane Borel's avatar
 
Stéphane Borel committed
239
    InitDCTTables( p_vpar );
Stéphane Borel's avatar
 
Stéphane Borel committed
240

241
    /* Mark thread as running and return */
242
    intf_DbgMsg("vpar debug: InitThread(%p) succeeded\n", p_vpar);
243
    return( 0 );
244 245 246
}

/*******************************************************************************
Stéphane Borel's avatar
Stéphane Borel committed
247
 * RunThread: generic parser thread
248
 *******************************************************************************
249
 * Video parser thread. This function does only returns when the thread is
250 251
 * terminated. 
 *******************************************************************************/
Stéphane Borel's avatar
Stéphane Borel committed
252
static void RunThread( vpar_thread_t *p_vpar )
253
{
Stéphane Borel's avatar
Stéphane Borel committed
254
    intf_DbgMsg("vpar debug: running video parser thread (%p) (pid == %i)\n", p_vpar, getpid());
255 256

    /* 
257
     * Initialize thread 
258
     */
Stéphane Borel's avatar
Stéphane Borel committed
259 260
    p_vpar->b_error = InitThread( p_vpar );
    if( p_vpar->b_error )
261 262 263
    {
        return;
    }
Stéphane Borel's avatar
Stéphane Borel committed
264
    p_vpar->b_run = 1;
265 266 267 268 269

    /*
     * Main loop - it is not executed if an error occured during
     * initialization
     */
Stéphane Borel's avatar
Stéphane Borel committed
270
    while( (!p_vpar->b_die) && (!p_vpar->b_error) )
271
    {
272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287
        /* Find the next sequence header in the stream */
        p_vpar->b_error = vpar_NextSequenceHeader( p_vpar );

#ifdef STATS
        p_vpar->c_sequences++;
#endif

        while( (!p_vpar->b_die) && (!p_vpar->b_error) )
        {
            /* Parse the next sequence, group or picture header */
            if( vpar_ParseHeader( p_vpar ) )
            {
                /* End of sequence */
                break;
            };
        }
288 289 290 291 292
    } 

    /*
     * Error loop
     */
Stéphane Borel's avatar
Stéphane Borel committed
293
    if( p_vpar->b_error )
294
    {
295
        ErrorThread( p_vpar );
296 297 298
    }

    /* End of thread */
Stéphane Borel's avatar
Stéphane Borel committed
299 300
    EndThread( p_vpar );
    p_vpar->b_run = 0;
301 302 303 304 305 306 307 308 309
}

/*******************************************************************************
 * ErrorThread: RunThread() error loop
 *******************************************************************************
 * This function is called when an error occured during thread main's loop. The
 * thread can still receive feed, but must be ready to terminate as soon as
 * possible.
 *******************************************************************************/
Stéphane Borel's avatar
Stéphane Borel committed
310
static void ErrorThread( vpar_thread_t *p_vpar )
311 312
{
    /* Wait until a `die' order */
Stéphane Borel's avatar
Stéphane Borel committed
313
    while( !p_vpar->b_die )
314 315
    {
        /* We take the lock, because we are going to read/write the start/end
Stéphane Borel's avatar
Stéphane Borel committed
316 317
         * indexes of the parser fifo */
        vlc_mutex_lock( &p_vpar->fifo.data_lock );
318 319

        /* ?? trash all trashable PES packets */
320
        while( !DECODER_FIFO_ISEMPTY(p_vpar->fifo) )
321
        {
322 323 324
            input_NetlistFreePES( p_vpar->bit_stream.p_input,
                                  DECODER_FIFO_START(p_vpar->fifo) );
            DECODER_FIFO_INCSTART( p_vpar->fifo );
325 326
        }

Stéphane Borel's avatar
Stéphane Borel committed
327
        vlc_mutex_unlock( &p_vpar->fifo.data_lock );
328
        /* Sleep a while */
329
        msleep( VPAR_IDLE_SLEEP );
330 331 332 333 334 335 336 337 338
    }
}

/*******************************************************************************
 * EndThread: thread destruction
 *******************************************************************************
 * This function is called when the thread ends after a sucessfull 
 * initialization.
 *******************************************************************************/
Stéphane Borel's avatar
Stéphane Borel committed
339
static void EndThread( vpar_thread_t *p_vpar )
340
{
341 342
    int i_dummy;

Stéphane Borel's avatar
Stéphane Borel committed
343
    intf_DbgMsg("vpar debug: destroying video parser thread %p\n", p_vpar);
344 345 346 347 348 349 350

#ifdef DEBUG
    /* Check for remaining PES packets */
    /* ?? */
#endif

    /* Destroy thread structures allocated by InitThread */
Stéphane Borel's avatar
Stéphane Borel committed
351
//    vout_DestroyStream( p_vpar->p_vout, p_vpar->i_stream );
352 353
    /* ?? */

354
    /* Destroy vdec threads */
355
    for( i_dummy = 0; i_dummy < NB_VDEC; i_dummy++ )
356 357 358 359 360 361 362
    {
        if( p_vpar->p_vdec[i_dummy] != NULL )
            vdec_DestroyThread( p_vpar->p_vdec[i_dummy] );
        else
            break;
    }

Stéphane Borel's avatar
Stéphane Borel committed
363
    intf_DbgMsg("vpar debug: EndThread(%p)\n", p_vpar);
364
}